Mortising-machine



W. T. S. PATE.

MORTISING MACHINE.

APPLICATION FILED NOV. 18, 1920.

1,397,900, Patented Nov. 22, 1921.

5 SHEETSSHEET I.

6 A$\ 1N\\2k\\\\ 1 1 I I I y mum/MR: w/messssz Sherman Date wllllam Q iw LJCM A TTORNEYS W. T. S. PATE.

MORTISING MACHINE.

APPLICATION FILED NOV. 18, 1920.

5 SHEETSSHEET 2.

INVENTOR Patented Nov. 22, 1921.

9 illiam T Sherman Date.

WITNESSES IWL ATTORNEYS W. T. S. PATE.

MORTISING MACHINE.

APPLICATION FILED uovds, 1920.

1,397,900. Patented Nov. 22, 1921.

5 SHEETS-SHEET 4.

IN ENTOR William T. Sherman Pa 35 W. T. S. PATE.

MORTISING MACHINE.

APPLICATION FILED NOV- 18, 1920.

1,397,900, Patented Nov. 22, 1921'.

5 SHEETSSHEET 5.

F81 8 33 9 a O 29 31 so 23 INVENTOR w William T. Sherman Date. flit Wfi.

A TTORNE Y8 UNITED STATES WILLIAM T. SHERMAN PATE, OF INDIANAPOLIS, INDIANA.

MORTISING-MACHINE.

Specification of Letters Patent.

Patented Nov. 22, 1921.

Application filed November 18, 1920. Serial No. 424,948.

T 0 all whom it may concern Be it known that I, \VILLIAM T. Srinaamx Pare, a citizen of the United States, and a resident of Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Mortising-Machines, of which the following is a specification.

My invention relates to improvements in wood working machinery, and it consists in the constructions. combinations, and mode of operation herein described and claimed.

One of the foremost objects of the in vention is to provide a mortising machine for cutting the bolt slot and rebate in objects such as furniture drawers and thelike.

A further object of the invention is to provide a mortising machine by means of which an elongated cavity may be bored,

with a surrounding relatively shallow depression or rebate. the idea being to provide a place into which either a lock, guard plate or the like. is to be set.

A further object of the invention is to provide a machine of the class described, wherein the work may be clamped in position and the foregoing operations performed without doing more than merely shifting the properlevers and notrequiring the removal of the work for a changing of position-or the performance of other operations in respect thereto.

Other objects and advantages will appear in the following specification, reference being had to the accompanying drawings, in which 1-- Figure 1 is a vertical section of the improved mortising machine, showing the levers thrown back to projectthe small bit for cutting the deep mortise,

Fig. 2 is a detail sectional view showing the lever thrown forwardly toretract the small bit and extend the larger for cutting the shallow recess or rebate,

Fig. is a horizontal section showing how the work carriage is moved to one side to cut the mortise as the small bit is rotated,

' Fig. l is'a similar view showing how the work carriage is moved to the other side in cutting the rebate.

Fig. 5 is a detail side elevation illustrating how the work is clamped on the work carriage,

Fig. (3 is a front elevation of the machine,

improved double bit,

of Cg. I,

Fig. 9 is a cross section on the line 9-9 of "lg. 7, and

F g. 10 is a detail perspective view illustrating a part of a piece of work mortised and rebated by this machine.

In order that the reader may quickly obtain a general idea of the purpose and mode of operation of the mortising machine, the description of the details is here receded by a brief sketch. The work is secured on the carriage 1 by the eccentric clamps Q. The lever 3, which moves the carriage 1 back and forth, is at this time in the left hand position.

The boring lover a is moved backwardly into the position shown in Fig. 1, which act extends the small bit 5 and causes it to bore into the edge of the work TV. The operator now shifts the work lever 3 toward the right, as in Fig. 33, causing the bit 5 to form the mortise M.

Now pull the bolt lever 4 forwardly. The large or secondary bit 6 is now projected while the primary or smaller bit 5 is retracted within the secondary bit, causing engagement with the edge of the work as shown in Fig. 4. The operator now pushes the work lever 3 toward the left, causing the cutting of the rebate B so that when the work lVis removed from the machine, the edge has the appearance illustrated in 10. The mortise and rebate are cut for such purposes as providing a place for a lock, or inserting the face plate through which the bolt ofa lock is to project into the mortise. This gives a general ideavof the pur pose and mode of operation of the machine, attention now being directed to the details.

The frame 7 is of any desired construction. It includes guide ribs 8 on which the work holder bracket 9 is vertically movable. Adjustments of the holder are made by turning the handle 10 of the screw 11 which is threaded into the follower12'of the holder bracket. The lower end of the screw has a swivel mounting 13 on the base of the frame.

A belt 1.3, applied to the pulleys 14 and 15 drives the primary and secondary bits which can be extended and retracted as the case may be, while rotating at the requisite S is a cross section on the line 8-8- of the frame.

speed. An extensionlti provides a mounting for the pivot 17 of the boring lever 4, the bifurcated end of this lever fittin over pins 18 of a head 19, which is by this means slid back and forth to shift the bits.

There is a guide rod 20'running fromthe head 19 on the front to a cross head 21 at the rear. The guide rod slides in the upper part The crosshead embraces the spindle 22 of the bits, the end collars 23 causing the spindle to slide backand forth with the crosshead, still permitting the tree rotation of the spindle as is obviously neces sary. e

A bracket 24 supports a pair of levers 25, the lower ends of which are bifurcated to straddl the pins 26 of the slide bars 27, the

upper ends being arcuately slotted to receive the pins 28 of the cross head. The shifting of the boring lever 4 produces a differential motion between the crosshead and levers 25,

of an extent equal to the length of the slots in the links.

Forward motion, for example, of the boring lever 4, causes the guide rod 2(), crosshead 21 and pins 28 to move backwardly,

- all the while retracting the primary bit 5 through the connection of the crosshead with the spindle 22, until the right ends of the slots are reached by the pins 28, at which time, continued forward motion of the hering lever l causes the levers 25 to rock and shiftsthe slide bars 27 forwardly carrying the larger and secondary bit '6 with it. On the reverse motion of the boring lever the action is the same. The pins then being at the right end of the slots will slightly retard the retraction of the secondary bit 6, but

7 when this retraction starts, as when the pins 28 reach the leftend of the slots' the primary bit 5 will not yet'have been projected so that the secondary bitwillhave time to clear the work before the former bit enters.

1 Consider nowthe construction of the primary and secondary bits. The slide bars'27 carry a bearing 29 at the front end, in which bearing the secondary bit 6 is rotatably mounted. The spindle 22, journaled in a bushing 30 on the main frame, has a noncircular extension 31-which finally merges into the primary bit 5. The sleeve 32 of the bit 6 includes an annular'collar 33 which oc- 'cupiesa corresponding recess in the bearing 29', for the purpose of preventing axial movement of the secondary loitbut stillenabling the-rotatlon thereof through the non-circular part 31 ofth'e continuously revolving spindle 22.

' When the boring. lever 4 is shifted in the manner explained above, the spindle 22 with its non-circular extension 31 and primary bit 5 moves axially as a whole, but this motion is relative to the secondary bit 6 in which the primary bit slides. It is not until 7 the pins 28 reach the back of the slots in the levers 25that the bit 6 begins to move oppositely to the bit 5, and that movement 1s produced through the slide bars 27, etc.

The work carriage ,1 slides; laterally in ribs 34 on the work holder bracket 9, this movement being produced through the connection of the work lever 3 to the carriage at the lug 35. The latch 36 of the work lever engages the various notches 1n the quadrant 37 to hold the work carnage in extreme 01' intermediate positions, but obviously when the button 38- of the latch is depressed, the lever may be worked back and forth freely so as to correspondingly slide the carriage.

Rectangular straps 39 slide vertically in guides 40 on the work carriage 1 when the eccentrics2, which occupy the "openings in 7 the straps,are-rotated through the crank and, link connections ll of the clamp lever 42.

The work is laid uponthe straps 39 and when the clamp'lever i2 is pulled forwardly,

the eccentrics 2'raise the straps 89 and work W against the stationary clamp shoes 43 so that the work is firmly aiiixed to the carriage for the subsequent operation of form- 2 ing the mortise and rebate.

Adjustments of the clamp shoes-4:3 can be I made at 4:4: on the standards or rods 45 on which they are mounted. These rods .or standards are carriedby the work carriage asclearly shown in Fig.1, Then it is desired to bore a keyhole opening in the work simultaneously with the rebating operation, a bit 46 is inserted in the holder 47 which is vertically slidable-in the head 48 of the extension 15. This holder isrevolved continuously by' thebelt 1-9 applied to the pulley 50, and moves up and down as the boring lever 1- is shifted back and forth, through the slide links 51 which are pivoted between parts of the lever and the saddle 52. hen it is desired not to bore holes with the final rebating operation, the bit 4-6 is simply removed and the shifting operation of the boring lever performed without it.

While the construction and arrangement of the improved mortisin'g machine as herein described and claimed, is that of a generally preferred form, obviouslymodifications and changes may beniade without departing for alternately moving the bits in respect to each other to project them into an operative position.

3. A mortising machine, comprising a mortising bit, a circumposed rebating bit, means for continuously rotating both bits, means enabling relative sliding movement of the bits while rotating, and means including a lever, for sliding the bits in opposite directions to each other, including a crosshead associated with the mortising bit, and link connections associated with the rebating bit arranged to move the mortising bit slightly before the rebating bit is started.

4. A mortising machine, comprising a mortising bit, with a spindle and crosshead; a rebating bit slidable on the mortising bit, with guides, and link connections to the crosshead; means for continuously rotating both bits, permitting sliding motion of the bits while rotating, and means, including a lever, connected to the erosshead movable in opposite directions to shift the bits and alternately advance them in turn to the operative position.

5. A mortising machine, comprising a mortising bit with a non-circular portion and a stem; a crosshead, in which the stem is revoluble, having a guide rod extending to a head, slide rods at the sides of the stem. with a bearing supporting a l'ebating bit on said non-circular portion; pivoted levers with pin and slot connections to the slide rods and crosshead, and a boring lever connected to the aforesaid head for shifting the guide rod and mortising bit in one direction, at the same time shifting the rebating bit through the connected links and slide bars in the other direction.

(3. A mortising machine, comprising the combination of a mortising bit, a circumposed rebating bit, means for continuously rotating both, permitting axial sliding movement during rotation, a single lever with connections to both bits for alternately projecting them into the working position, a work carriage, and means for shifting it at right angles to the axis of the bits regardless of the position of the latter.

VILLIAM T. SHERMAN PAT 

